Scientists agree that aircraft pollution affects surface temperatures, but some people believe they have a darker side
A sky crisscrossed with contrails from high-flying aircraft is a familiar sight in Britain and North America. Depending on the weather conditions these can merge into a blanket of high cloud that at times can be dense enough to blot out the sun.
Understanding exactly what this does to the climate is still work in progress, but it’s generally agreed that in these areas where the aircraft are constantly pouring out pollution the contrails make the nights warmer by acting as a blanket and the days cooler by reflecting sunlight back into space. Some studies suggest that over 30 years, these contrails will raise average surface temperature by as much as 1C, a serious magnification of global warming.
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Source: Guardian Environment